Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details)

v2.4.1.9
Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities $ 99,037us-gaap_NetCashProvidedByUsedInOperatingActivities $ 156,150us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by (used in) investing activities (231,491)us-gaap_NetCashProvidedByUsedInInvestingActivities (445,112)us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) financing activities 64,854us-gaap_NetCashProvidedByUsedInFinancingActivities 388us-gaap_NetCashProvidedByUsedInFinancingActivities
Net decrease in cash and cash equivalents (67,600)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (288,574)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period 142,340us-gaap_CashAndCashEquivalentsAtCarryingValue 458,956us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period 74,740us-gaap_CashAndCashEquivalentsAtCarryingValue 170,382us-gaap_CashAndCashEquivalentsAtCarryingValue
Parent [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 95,879us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
159,736us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash provided by (used in) investing activities (228,601)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(443,079)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash provided by (used in) financing activities 64,854us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
388us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net decrease in cash and cash equivalents (67,868)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(282,955)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cash and cash equivalents at beginning of period 141,535us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
451,431us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cash and cash equivalents at end of period 73,667us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
168,476us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Guarantors [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 3,158us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(3,585)us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net cash provided by (used in) investing activities (2,890)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(2,034)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net cash provided by (used in) financing activities 0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net decrease in cash and cash equivalents 268us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(5,619)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at beginning of period 804us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
7,525us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at end of period 1,072us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
1,906us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Non-Guarantor [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 0us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(1)us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net cash provided by (used in) investing activities (6,093)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(8,069)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net cash provided by (used in) financing activities 6,093us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
8,070us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net decrease in cash and cash equivalents 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at beginning of period 1us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at end of period 1us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Eliminations [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 0us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net cash provided by (used in) investing activities 6,093us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
8,070us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net cash provided by (used in) financing activities (6,093)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(8,070)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net decrease in cash and cash equivalents 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents at beginning of period 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents at end of period $ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
$ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember